Ensure tasty foods and beverages. Chemotherapy can affect the patient’s taste buds, making some foods and beverages taste metallic or poorly flavored. Generally during chemotherapy, water and meat tastes worse when eaten. When patients do not want to drink plain water, they can try some mineral water with better taste or plain water with some lemon slices. If you don’t like meat, eat other proteins such as eggs, low-fat milk, soy and fish. 1, prevention and treatment of constipation Some patients will have diarrhea with chemotherapy, while other patients will have constipation. Drinking plenty of water is good for preventing constipation, and plenty of dietary fiber is also good for preventing constipation. If patients are not comfortable eating too much fiber-containing food, they can slowly increase the amount of food they eat. Even a 20-minute walk can effectively stimulate bowel movement during chemotherapy. 2. Weight control Some cancer patients will gain weight during chemotherapy. It is recommended to have a low-fat diet and eat more vegetables. 3.Enhance appetite Patients often have poor appetite during chemotherapy, so it is recommended to eat some snacks, including peanut butter or other nut sauces, yogurt and various kinds of porridge. 4, reduce diarrhea diarrhea during chemotherapy, avoid eating greasy and fried foods, drinks or juices containing caffeine or too much sugar. Oatmeal, most peeled fruits, potatoes and pumpkin can usually be eaten. 5. Keep a dietary record of the patient’s food and drinks and write down the symptoms at the time of eating and after eating, so that it is helpful to adjust the diet and know the foods that cause nausea, diarrhea, or constipation. Avoid eating these foods during each chemotherapy treatment. 6, relieve oral discomfort Some chemotherapy will appear after the mouth ulcers or oral mucositis. Avoid spicy foods, alcohol, and foods that are too hot. Drink plenty of water throughout the day to keep the mouth moist. Salt water rinse after eating is good for relieving oral discomfort. 7, avoid dehydration Diarrhea and vomiting, while drinking little water can lead to dehydration. Symptoms of dehydration are dry mouth and sticky feeling in the mouth, dry eyes, and small amount of yellow urine. Drinking plenty of water can prevent dehydration. 8, control nausea Eat cooler foods, chew sugar-soaked ginger, drink some mint or ginger tea, can help control nausea. Avoid eating greasy or fried foods, as well as foods with strong irritating odors. 9, eat less and more meals during chemotherapy each time a small amount of food will be more tolerable. Smaller and more frequent meals will also reduce nausea symptoms. 10, less supplemental nutrients during chemotherapy is best not to take vitamins, trace elements, minerals, or herbal nutrients. These nutritional products may react with chemotherapy drugs, and affect the effect of chemotherapy.